2.12: Earth's Outer Layers

Gases, water, rock and living organisms are all found at Earth's surface. These materials are also found above or below the surface. They interact with each other and in doing so alter each other. For example, the hydrosphere may cause some of the lithosphere to wash away.

Spheres

Earth is made of layers. Since Earth is round, the layers all have the ending sphere (
Figure
below
).

Some of the different parts of the Earth are the:

Atmosphere
: the thin layer of air, mostly nitrogen and oxygen, that surrounds the Earth.